139780890 has 192 divisors, whose sum is σ = 409473792. Its totient is φ = 34214400.

The previous prime is 139780889. The next prime is 139780897. The reversal of 139780890 is 98087931.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139780897) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2291460 + ... + 2291520.

It is an arithmetic number, because the mean of its divisors is an integer number (2132676).

Almost surely, 2^139780890 is an apocalyptic number.

139780890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 139780890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (204736896).

139780890 is an abundant number, since it is smaller than the sum of its proper divisors (269692902).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

139780890 is a wasteful number, since it uses less digits than its factorization.

139780890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147 (or 135 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 45.

The square root of 139780890 is about 11822.8968531405. The cubic root of 139780890 is about 518.9783812706.

The spelling of 139780890 in words is "one hundred thirty-nine million, seven hundred eighty thousand, eight hundred ninety".